The Boiling Lake is a flooded fumarole located in Morne Trois Pitons National Park, a World Heritage Site on the island of Dominica.

The lake, located 6.5 miles (10.5 km) east of Dominica's capital Roseau, is filled with bubbling greyish-blue water that is usually enveloped in a cloud of vapour.

The first recorded sighting of the lake was in 1870 by Edmund Watt and Henry Alfred Alford Nicholls, two Englishmen working in Dominica at that time.

In the 1870s it was deep; after a phreatic eruption nearby in 1880, the lake disappeared and formed a fountain of hot water and steam.

More accurately, it is a flooded fumarole, generally located within the vicinity of a volcano, which emits steam and gases escaping from molten magma below.